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1 /*-
2  * Generic utility routines for the Common Access Method layer.
3  *
4  * Copyright (c) 1997 Justin T. Gibbs.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions, and the following disclaimer,
12  *    without modification, immediately at the beginning of the file.
13  * 2. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33 #ifdef _KERNEL
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/sysctl.h>
38 #else /* _KERNEL */
39 #include <stdlib.h>
40 #include <stdio.h>
41 #endif /* _KERNEL */
42
43 #include <cam/cam.h>
44 #include <cam/cam_ccb.h>
45 #include <cam/scsi/scsi_all.h>
46 #include <sys/sbuf.h>
47
48 #ifdef _KERNEL
49 #include <sys/libkern.h>
50 #include <cam/cam_xpt.h>
51 #endif
52
53 static int      camstatusentrycomp(const void *key, const void *member);
54
55 const struct cam_status_entry cam_status_table[] = {
56         { CAM_REQ_INPROG,        "CCB request is in progress"                },
57         { CAM_REQ_CMP,           "CCB request completed without error"       },
58         { CAM_REQ_ABORTED,       "CCB request aborted by the host"           },
59         { CAM_UA_ABORT,          "Unable to abort CCB request"               },
60         { CAM_REQ_CMP_ERR,       "CCB request completed with an error"       },
61         { CAM_BUSY,              "CAM subsytem is busy"                      },
62         { CAM_REQ_INVALID,       "CCB request was invalid"                   },
63         { CAM_PATH_INVALID,      "Supplied Path ID is invalid"               },
64         { CAM_DEV_NOT_THERE,     "Device Not Present"                        },
65         { CAM_UA_TERMIO,         "Unable to terminate I/O CCB request"       },
66         { CAM_SEL_TIMEOUT,       "Selection Timeout"                         },
67         { CAM_CMD_TIMEOUT,       "Command timeout"                           },
68         { CAM_SCSI_STATUS_ERROR, "SCSI Status Error"                         },
69         { CAM_MSG_REJECT_REC,    "Message Reject Reveived"                   },
70         { CAM_SCSI_BUS_RESET,    "SCSI Bus Reset Sent/Received"              },
71         { CAM_UNCOR_PARITY,      "Uncorrectable parity/CRC error"            },
72         { CAM_AUTOSENSE_FAIL,    "Auto-Sense Retrieval Failed"               },
73         { CAM_NO_HBA,            "No HBA Detected"                           },
74         { CAM_DATA_RUN_ERR,      "Data Overrun error"                        },
75         { CAM_UNEXP_BUSFREE,     "Unexpected Bus Free"                       },
76         { CAM_SEQUENCE_FAIL,     "Target Bus Phase Sequence Failure"         },
77         { CAM_CCB_LEN_ERR,       "CCB length supplied is inadequate"         },
78         { CAM_PROVIDE_FAIL,      "Unable to provide requested capability"    },
79         { CAM_BDR_SENT,          "SCSI BDR Message Sent"                     },
80         { CAM_REQ_TERMIO,        "CCB request terminated by the host"        },
81         { CAM_UNREC_HBA_ERROR,   "Unrecoverable Host Bus Adapter Error"      },
82         { CAM_REQ_TOO_BIG,       "The request was too large for this host"   },
83         { CAM_REQUEUE_REQ,       "Unconditionally Re-queue Request",         },
84         { CAM_IDE,               "Initiator Detected Error Message Received" },
85         { CAM_RESRC_UNAVAIL,     "Resource Unavailable"                      },
86         { CAM_UNACKED_EVENT,     "Unacknowledged Event by Host"              },
87         { CAM_MESSAGE_RECV,      "Message Received in Host Target Mode"      },
88         { CAM_INVALID_CDB,       "Invalid CDB received in Host Target Mode"  },
89         { CAM_LUN_INVALID,       "Invalid Lun"                               },
90         { CAM_TID_INVALID,       "Invalid Target ID"                         },
91         { CAM_FUNC_NOTAVAIL,     "Function Not Available"                    },
92         { CAM_NO_NEXUS,          "Nexus Not Established"                     },
93         { CAM_IID_INVALID,       "Invalid Initiator ID"                      },
94         { CAM_CDB_RECVD,         "CDB Received"                              },
95         { CAM_LUN_ALRDY_ENA,     "LUN Already Enabled for Target Mode"       },
96         { CAM_SCSI_BUSY,         "SCSI Bus Busy"                             },
97 };
98
99 const int num_cam_status_entries =
100     sizeof(cam_status_table)/sizeof(*cam_status_table);
101
102 #ifdef _KERNEL
103 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem");
104 #endif
105
106 void
107 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
108 {
109
110         /* Trim leading/trailing spaces, nulls. */
111         while (srclen > 0 && src[0] == ' ')
112                 src++, srclen--;
113         while (srclen > 0
114             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
115                 srclen--;
116
117         while (srclen > 0 && dstlen > 1) {
118                 u_int8_t *cur_pos = dst;
119
120                 if (*src < 0x20 || *src >= 0x80) {
121                         /* SCSI-II Specifies that these should never occur. */
122                         /* non-printable character */
123                         if (dstlen > 4) {
124                                 *cur_pos++ = '\\';
125                                 *cur_pos++ = ((*src & 0300) >> 6) + '0';
126                                 *cur_pos++ = ((*src & 0070) >> 3) + '0';
127                                 *cur_pos++ = ((*src & 0007) >> 0) + '0';
128                         } else {
129                                 *cur_pos++ = '?';
130                         }
131                 } else {
132                         /* normal character */
133                         *cur_pos++ = *src;
134                 }
135                 src++;
136                 srclen--;
137                 dstlen -= cur_pos - dst;
138                 dst = cur_pos;
139         }
140         *dst = '\0';
141 }
142
143 /*
144  * Compare string with pattern, returning 0 on match.
145  * Short pattern matches trailing blanks in name,
146  * wildcard '*' in pattern matches rest of name,
147  * wildcard '?' matches a single non-space character.
148  */
149 int
150 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
151 {
152
153         while (*pattern != '\0'&& str_len > 0) {  
154
155                 if (*pattern == '*') {
156                         return (0);
157                 }
158                 if ((*pattern != *str)
159                  && (*pattern != '?' || *str == ' ')) {
160                         return (1);
161                 }
162                 pattern++;
163                 str++;
164                 str_len--;
165         }
166         while (str_len > 0 && *str++ == ' ')
167                 str_len--;
168
169         return (str_len);
170 }
171
172 caddr_t
173 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
174                int entry_size, cam_quirkmatch_t *comp_func)
175 {
176         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
177                 if ((*comp_func)(target, quirk_table) == 0)
178                         return (quirk_table);
179         }
180         return (NULL);
181 }
182
183 const struct cam_status_entry*
184 cam_fetch_status_entry(cam_status status)
185 {
186         status &= CAM_STATUS_MASK;
187         return (bsearch(&status, &cam_status_table,
188                         num_cam_status_entries,
189                         sizeof(*cam_status_table),
190                         camstatusentrycomp));
191 }
192
193 static int
194 camstatusentrycomp(const void *key, const void *member)
195 {
196         cam_status status;
197         const struct cam_status_entry *table_entry;
198
199         status = *(const cam_status *)key;
200         table_entry = (const struct cam_status_entry *)member;
201
202         return (status - table_entry->status_code);
203 }
204
205
206 #ifdef _KERNEL
207 char *
208 cam_error_string(union ccb *ccb, char *str, int str_len,
209                  cam_error_string_flags flags,
210                  cam_error_proto_flags proto_flags)
211 #else /* !_KERNEL */
212 char *
213 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
214                  int str_len, cam_error_string_flags flags,
215                  cam_error_proto_flags proto_flags)
216 #endif /* _KERNEL/!_KERNEL */
217 {
218         char path_str[64];
219         struct sbuf sb;
220
221         if ((ccb == NULL)
222          || (str == NULL)
223          || (str_len <= 0))
224                 return(NULL);
225
226         if (flags == CAM_ESF_NONE)
227                 return(NULL);
228
229         switch (ccb->ccb_h.func_code) {
230                 case XPT_SCSI_IO:
231                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
232                         case CAM_EPF_NONE:
233                                 break;
234                         case CAM_EPF_ALL:
235                         case CAM_EPF_NORMAL:
236                                 proto_flags |= CAM_ESF_PRINT_SENSE;
237                                 /* FALLTHROUGH */
238                         case CAM_EPF_MINIMAL:
239                                 proto_flags |= CAM_ESF_PRINT_STATUS;
240                                 /* FALLTHROUGH */
241                         default:
242                                 break;
243                         }
244                         break;
245                 default:
246                         break;
247         }
248 #ifdef _KERNEL
249         xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
250 #else /* !_KERNEL */
251         cam_path_string(device, path_str, sizeof(path_str));
252 #endif /* _KERNEL/!_KERNEL */
253
254         sbuf_new(&sb, str, str_len, 0);
255
256         if (flags & CAM_ESF_COMMAND) {
257
258                 sbuf_cat(&sb, path_str);
259
260                 switch (ccb->ccb_h.func_code) {
261                 case XPT_SCSI_IO:
262 #ifdef _KERNEL
263                         scsi_command_string(&ccb->csio, &sb);
264 #else /* !_KERNEL */
265                         scsi_command_string(device, &ccb->csio, &sb);
266 #endif /* _KERNEL/!_KERNEL */
267                         sbuf_printf(&sb, "\n");
268                         
269                         break;
270                 default:
271                         break;
272                 }
273         }
274
275         if (flags & CAM_ESF_CAM_STATUS) {
276                 cam_status status;
277                 const struct cam_status_entry *entry;
278
279                 sbuf_cat(&sb, path_str);
280   
281                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
282
283                 entry = cam_fetch_status_entry(status);
284
285                 if (entry == NULL)
286                         sbuf_printf(&sb, "CAM Status: Unknown (%#x)\n",
287                                     ccb->ccb_h.status);
288                 else
289                         sbuf_printf(&sb, "CAM Status: %s\n",
290                                     entry->status_text);
291         }
292
293         if (flags & CAM_ESF_PROTO_STATUS) {
294   
295                 switch (ccb->ccb_h.func_code) {
296                 case XPT_SCSI_IO:
297                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
298                              CAM_SCSI_STATUS_ERROR)
299                                 break;
300
301                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
302                                 sbuf_cat(&sb, path_str);
303                                 /*
304                                  * Print out the SCSI status byte as long as
305                                  * the user wants some protocol output.
306                                  */
307                                 sbuf_printf(&sb, "SCSI Status: %s\n",
308                                             scsi_status_string(&ccb->csio));
309                         }
310
311                         if ((proto_flags & CAM_ESF_PRINT_SENSE)
312                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
313                          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
314
315 #ifdef _KERNEL
316                                 scsi_sense_sbuf(&ccb->csio, &sb,
317                                                 SSS_FLAG_NONE);
318 #else /* !_KERNEL */
319                                 scsi_sense_sbuf(device, &ccb->csio, &sb,
320                                                 SSS_FLAG_NONE);
321 #endif /* _KERNEL/!_KERNEL */
322                         }
323                         break;
324                 default:
325                         break;
326                 }
327         }
328
329         sbuf_finish(&sb);
330
331         return(sbuf_data(&sb));
332 }
333
334 #ifdef _KERNEL
335
336 void
337 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
338                 cam_error_proto_flags proto_flags)
339 {
340         char str[512];
341
342         printf("%s", cam_error_string(ccb, str, sizeof(str), flags,
343                proto_flags));
344 }
345
346 #else /* !_KERNEL */
347
348 void
349 cam_error_print(struct cam_device *device, union ccb *ccb,
350                 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
351                 FILE *ofile)
352 {
353         char str[512];
354
355         if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
356                 return;
357
358         fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
359                 flags, proto_flags));
360 }
361
362 #endif /* _KERNEL/!_KERNEL */
363
364 /*
365  * Common calculate geometry fuction
366  *
367  * Caller should set ccg->volume_size and block_size.
368  * The extended parameter should be zero if extended translation
369  * should not be used.
370  */
371 void
372 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
373 {
374         uint32_t size_mb, secs_per_cylinder;
375
376         size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
377         if (size_mb > 1024 && extended) {
378                 ccg->heads = 255;
379                 ccg->secs_per_track = 63;
380         } else {
381                 ccg->heads = 64;
382                 ccg->secs_per_track = 32;
383         }
384         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
385         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
386         ccg->ccb_h.status = CAM_REQ_CMP;
387 }